Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
mastechconstruction.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-01 05:56:54 UTC · ↺ Refresh
MX Hostnames
- mastechconstruction-com.mail.protection.outlook.com
MX Priorities
- mastechconstruction-com.mail.protection.outlook.com: 0
A / AAAA Records
- 173.209.47.194 ↩ cp310.zenutech.com
Mail Server IPs
- 52.101.50.1 ↩ mail-co1pr05cu00401.inbound.protection.outlook.com
- 52.101.9.21 ↩ mail-bl2pr04cu00205.inbound.protection.outlook.com
- 52.101.194.19 ↩ mail-ch5pr02cu00303.inbound.protection.outlook.com
- 52.101.9.11 ↩ mail-bl2pr04cu00103.inbound.protection.outlook.com
- 2a01:111:f403:f913::1 ↩ mail-cy5pr05cu00101.inbound.protection.outlook.com
- 2a01:111:f403:f804::2 ↩ mail-co1pr05cu00402.inbound.protection.outlook.com
- 2a01:111:f403:c946::6 ↩ mail-ch5pr02cu00406.inbound.protection.outlook.com
- 2a01:111:f403:c946::5 ↩ mail-ch4pr21cu00105.inbound.protection.outlook.com
SOA Record
Raw SOA
dns4.zenutech.com support.zenutech.com 2026013001 3600 1800 1209600 86400
Primary NS (mname)
dns4.zenutech.com
Admin Email (rname)
support@zenutech.com
Serial
2026013001
Refresh
3600s
Retry
1800s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
dns4.zenutech.com
dns5.zenutech.com
dns6.zenutech.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
5 records- google-site-verification=kQuJ6nkF1hWoE9_y1NmCKS-yxu2HIg4QtpVcl_eJHC0
- logmein-verification-code=c1af6491-9766-41e3-ba23-85542082daa7
- MS=ms59709598
- SPFv=spf1 include:spf.protection.outlook.com -all
- duo_sso_verification=qFZvHDvw1UwAJjsnKmypXEn0nnvhv7JtRGugo2Qpyua8GATQrzGvEekJ6exdRofY
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